Ok guys, I installed my Zeitronix ZT2 w/ display today, everything is wired correctly and I have it wired for simulated narrowband. So the check engine light comes on and it runs fine right, well thats normal. So, I go and change the StockLS.bin and check it to disable the o2 heater and burn it, put it in my ECU. Reset my ecu and start it up, no check engine light, but the car runs extremely rough, shakes alot, and looking at my AFR at idle it's at between 10-10.5.

The only thing other then wideband that I have done to my car is a Walbro 255 fuel pump. Anyway, after messing with different things I gave up and put back the StockLS.bin and deal with the check engine light. My AFR at idle like this is about 13... when I was messing with the uberdata config I upped the fuel pressure to 55 because I read that it ups the fuel pressure by about 10. Doing this made it run a little better, it didnt shake as much and idled between 11-12. I checked closed loop and o2 heater and still it ran like complete crap.

I don't know what else to do, could anyone PLEASE give me some advice? Am I doing anything wrong? Is there something I should know that I don't? PLEASE HELP!

 

Well for starts what is your setup, fuel, turbo? ect... What are you trying to do with Uberdata, did you try and mess with any of the fuel enrichment values, or did you try to change your fuel values at idle try and get your A/F to where you want it?

 

I haven't installed the turbo yet, right now I just want the wideband installed so I can watch the AFR and get an idea of what it should look like while everything is stock so I can no what to aim for when I install the turbo and start tuning.

The car is completely stock except for the wideband and walbro 255 fuel pump, I just want to get rid of the CEL and get it running like stock so I can see the AFR at different rpm's.

 

You should really take this to the uberdata forums, but... How does it run on the stock rom with stock conditions. The only reason I could see that you would get any different values when switching the o2 heater circuit check off and forcing closed loop is if you wired the simulated narrow band wrong and it is seeing instead that you are lean and constantly adding fuel.

 

after the walbro, did u get a FPR? i hear the walbro runs too much fuel pressure without a adjustable fpr.

 

I run the high pressure version of the walbro 255 with no problems at all. I think he is looking for an explanation as to why the unmodified stock bin idles with normal A/F values but when he modifies it with the O2 Circuit turned off the car stumbles and idles very rich.

 

is there any difference here with the water temp of the car? IE, when i start my car in the morning, it at 11:1, after it warms up to its normal 195 degree water temp, my a/f drops back to 14.7:1.

also if you added a walbro, you need to adjust for the higher fuel pressure, your fuel pressure it up from before, therefore you are getting alot more fuel, you need to change the multiplier to accept the new increased flow.

also, i can't think of any reason why it would run leaner with the o2 CEL, as i would think it would jump into limp mode.

either way, disable the o2 heater and adjust teh multiplier. this is when a romulator really helps out

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by beta13 &raquo;</TD></TR><TR><TD CLASS="quote">I think he is looking for an explanation as to why the unmodified stock bin idles with normal A/F values but when he modifies it with the O2 Circuit turned off the car stumbles and idles very rich.</TD></TR></TABLE>

It's always been that way for me too. As soon as you check 'O2 disable' and 'Closed Loop Disable' it starts idling in the 11:1 range instead of 14.7:1. I just kept pulling fuel until it was in the range I wanted again and tuned from there. Un-checking CL Disable and unchecking O2 disable then makes the car drive pretty much perfectly I wouldn't bother tuning without checking CL disable and O2 disable anymore, the ECU messes with all the values too quickly.

 

The stock ROM run through UD is no longer stock. It's quite horrifying how the "stock" basemaps with a few UD tweaks run horribly rich. OEM maps are 8 bit values, recent UD versions convert them to 16 bit values for increased resolution, which makes them run completely different.

StockGSR .bin ran a fresh 12:1 GSR with ported head, Skank2 IM, and bolt ons at 10.5-10.9:1 AFR at idle, staggering, and I forget what the WOT maps were at but I recall taking 20% fuel out of them to get to 13:1 AFR. The .bin for that is located on UD Forum in the ROM section - feel free to use it as a good basemap for GSRs. Ran that .bin on a friend's 9:1 CR future turbo LS/VTEC last night, it was running ~13.5 at idle and in the high 12's at WOT... pretty damn close, IMO.

Closed loop, ECU tunes for stoich at idle and cruise... but if your fuel values are too far off it can't reel in that big of a discrepancy. You can do quick and sleazy idle + part throttle tunes, and let closed loop mask some problems, although I don't recommend it - you always end up with hiccoughs and strange behavior. One of my friends set his ZDyne to 2.6 ms pulses for the majority of his part throttle maps when tuning a set of 900cc for his turbo setup. I asked him why he didn't spend the extra time, "that's what closed loop is for."

 

Is that the rom that says ls/vtec 9 psi tuned. If not which rom are you speaking of on the uberdata site.

 

No. I haven't posted Wes' revision for his 9:1 CR LS/VTEC. I did post the 12:1 CR GSR:

http://www.ecimulti.org/uberda...=2111

 

o ok thanks

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by J. Davis &raquo;</TD></TR><TR><TD CLASS="quote">Closed loop, ECU tunes for stoich at idle and cruise... but if your fuel values are too far off it can't reel in that big of a discrepancy. You can do quick and sleazy idle + part throttle tunes, and let closed loop mask some problems, although I don't recommend it - you always end up with hiccoughs and strange behavior. </TD></TR></TABLE>

One of the most interesting things I've noted is the 24"/Hg column in particular. It's so far off it's not even funny. I usually start off a basemap for people by adding roughly 300% fuel to that column so that it doesn't drive at very light throttle at 20:1 a/f. But I think that's one of the most overlooked columns for overall driveability and a lot of the part-throttle concerns people have with on-off throttle transitions are caused by that column.

 

The RC 1100cc tune I did, that was a hard column to tune. Those big injectors are wierd, car in question was bucky-jerky in parking lot situations. I never noticed it when tuning because I was either driving or taking off from a standstill and everything was groovy... never on/off throttle repeatedly in first gear. I got a lovely hatemail voice message from Trav-*** over that one, lol.

A lot of people think you tune idle, NA, boost, done. When dealing with large injectors, other parts of the map get thrown way off.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by J. Davis &raquo;</TD></TR><TR><TD CLASS="quote">The RC 1100cc tune I did, that was a hard column to tune. Those big injectors are wierd, car in question was bucky-jerky in parking lot situations. </TD></TR></TABLE>

Hell ya... it's the worst one to leave untuned if you ever drive in heavy traffic Heheh...